
By the time del Potro levelled at 3-3 in the second set, I went to bed because I'm pretty confident about his chance to the semifinal.

The second quarterfinal match between Rafael Nadal and Fernando Gonzalez was suspended due to rain.
Here's Friday's order of play on day 12 at the U.S. Open (prefix denotes seeding):
(Starts at 12:30 PM)
Kim Clijsters (Belgium) v 2-Serena Williams (USA)
(Not before 2:00 PM; match may be moved to Armstrong)
11-Fernando Gonzalez (Chile) v 3-Rafael Nadal (Spain)
(Match may be moved to Armstrong)
Yanina Wickmayer (Belgium) v 9-Caroline Wozniacki (Denmark)
(Images via Yahoo! Sports)